{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

L1Notes - lens grows forward w age Vitreous POSTERIOR...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
1/24/08 The Eye and Sight: How does it work in the normal eye? UV 400-700nm IR VIBGYOR Light enters pupil Iris controls pupil size to control amount of light getting in Cornea-2/3’s Lens-1/3 of power of the eye Both are transparent Fovea: dark spot at the center of retina Sclera: outermost tough coat of eye Choroid: blood vessels (spongey) Retina: innermost part of eye (nerve tissues brain) (axons optic nerves) Human eye diameter Takes only 2 years to get to adult size (24mm) Human crystalline lens Yellows and stiffens w/ age Can’t change shape Need reading glasses Cornea ( aqueous ANTERIOR chamber
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ( lens grows forward w/ age ) Vitreous POSTERIOR Chamber: jello-like –age watery (liquefies) Macula / Fovea (pit): center of retina, highest density of photoreceptors Visual Acuity & Color Vision best at fovea! Two kinds of photoreceptors in the retina Rods-night-20/200 grayscale Cones-day-20/20 color 3 types: blue, green, red rods (most sensitive to light) > cones 15˚ blind spot: NO photoreceptors Eye Movements-“pursuit” follow; “saccade” jump Divergence vs Convergence (allows stereo/3D vision)...
View Full Document

  • Spring '08
  • levi
  • photoreceptors Eye Movements, photoreceptors Visual Acuity, retina Rods-night-20/200 grayscale, 400-700nm VIBGYOR IR, crystalline lens Yellows

{[ snackBarMessage ]}

Ask a homework question - tutors are online